The 490T-SA-PI two star wafer tweezer for 4 wafers has a solid PTFE upper paddle which allows for less marring or scratching and has greater surface contact. The overall length is 5. The tool is made of anti-magnetic stainless steel and Features: serrated handles for better control.Specs amp; FeaturesWafer for 4 wafers, PTFE Upper Paddle, Application: PTFE upper paddle allows greater surface contact without scratching the wafer, Quality: , Surface Resistivity : Conductive, Material: Anti-Mag. SS, OAL: 5 (125mm), Body Width: 0.472 (11.8mm), Body Height: 0.157 (3.93mm), Tip Width: .472 (12mm), Tip Height: .125 (3.1mm)